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Mould Remediation Services

Protecting your health

Got Mould? We've got the solution!

Your questions answered by our senior consultant Phil Edwards

Phil has been fixing water damage and mould issues for over 35 years, both here in the UK and for 10 years in the USA. In addition to his extensive experience, Phil is still 'working on the job' and has all the necessary qualifications and certifications available on request. Phil's approach is personable and practical - he's not an alarmist or scare-mongerer, but will advise if your health is at risk. He trusts the scientific analysis from our enviroforensics laboratory but dovetails this with common sense and his vast experience in the results interpretation and reporting. The WHITE KNIGHT solution will always be proportional and appropriate for each individual circumstance.

If I see mould what should I do?

Visible mould in an indoor environment is a strong indicator of either a previous or ongoing water intrusion. Moulds are ubiquitous, which means they can be found everywhere; it’s natures way of recycling waste materials, but issues arise when the amount of mould in an indoor space increases exponentially and has an effect on the building fabric and the human body.

Self help:

  1. Wear an FFP2 painters mask

  2. Cover the affected area with plastic, and tape the edges firmly with duct tape until a proper assessment can be made

  3. Open windows and doors if possible, to allow better airflow and air exchanges to occur

  4. Turn on bathroom/kitchen extractor fans

  5. Don't use bleach as this can release spores into the air and make matters worse

Call us to arrange a leak detection / condensation survey + report (fixed price £495.00 + vat)

I feel unwell at home but nowhere else, is there a mould / indoor air quality issue that requires investigation?

I never recall having any mould/allergen/pollen related issues myself as a younger person but about 15 years ago, I recognised significant respiratory symptoms when being in areas with high levels of microbial activity. Despite wearing the best quality PPE and respiratory protection when performing mould surveys and mould remediation, there have been numerous situations where no visible mould was present and therefore I haven't been wearing any PPE, exposing me to higher levels of invisible contaminants than my body could tolerate - in these situations, I have ended up wheezing and have had to grab my respirator. So, just because you can’t see mould, it doesn’t mean it isn’t present. In summary, if you are feeling unwell at home with symptoms such as respiratory issues, allergies, asthma, sneezing, a runny nose, red eyes and/or skin rashes, it could point to a mould or other indoor air quality issue that does require some investigation and testing.

Call us to arrange a moisture / indoor air quality survey  + report (fixed price £495.00 + vat)

Is this something I can treat myself or should I call in an expert?

Unfortunately, the mould industry is rife with unscrupulous scare-mongerers who use bogus qualifications like "Indoor Environmental Hygienist" and bunkum science to prey on people who have health issues or a fear associated with mould. In the USA their motto is "Mold is Gold".  We advise that you do your very best to avoid companies or individuals that come across like this.

WHITE KNIGHT perform mould remediation and decontamination - we are a 'for profit' family business but our reputation is far more important than the money we could make performing unnecessary work, so you will always get a fair and reasonable assessment of your personal situation, with a genuine and proportionate solution to fix the problem. Honour and integrity are at the core of our business activities, which is why we retain so many loyal customers.

Call us to arrange a 30 minute "over the phone consultation" (fixed price £95.00 + vat)



Can you advise on my health issues?

I know first-hand how lethargic and irritating the inflammatory response to mould overexposure can be but I'm not a health professional, so I cannot advise on your personal health issues - anyone who advises that your health concerns are attributable to a water leak or mould activity in your property, without proper investigation and analysis doesn't know either! Globally there are NO standards for what constitutes a health concern in relation to mould exposure or any agreed standards on how to effectively treat mould. The WHO (World Health Organisation) and other regulatory bodies and associations offer simple guidance in the form of "remove the mould, and fix the issues causing water ingress".  Fortunately, with our years of expertise in testing and treating mould presence, we can review your individual situation and needs and put together an effective plan to fully resolve your issues. 



How can WHITE KNIGHT help me?

At WHITE KNIGHT we’re genuinely interested in helping YOU to improve YOUR living conditions and hopefully this has a positive impact on your health too. We take a holistic view of all the potential issues that can cause long term damage to properties by moulds and fungi and follow industry 'best practice' to achieve the desired outcome.


How much does mould remediation cost and is it covered by my insurance?

Structural damage caused by long term water ingress and microbial activity may or may not be covered by your property insurance - it will depend on the source of the problem, your insurer and how your insurance policy is worded but with the unknown health risks and associated property damage costs, it makes good sense to get an expert opinion and report to help your case.  When it comes to genuine health risks, we really believe that people shouldn't take chances, and we are here to help.


Mould remediation doesn’t typically run into tens of thousands of pounds but it isn't always a quick, cheap and easy problem to fix properly.


You should consider the following:

  • Initial survey / inspection / invasive investigation / report fees (anything from £95 to £1,495)

  • Surface swab and laboratory surface bulk sampling / air-sampling / spore count analysis to establish baseline levels of contamination or identify the mould species (from £10 to £325 per sample)

  • Advanced air sampling and possible Volatile Organic Compounds (VOC) analysis (POA)

  • Engineering controls and specialist equipment to prevent exposure to you and cross-contamination to unaffected areas

  • Remediation costs by our IICRC WRT/ASD/AMRT certified decontamination specialists to remove all affected materials (typically £995/day)

  • PPE and PAPR systems to protect our engineers (£57.50 per day)

  • Controlled materials waste management, removal and disposal  

  • Environmental deep clean (£285 / room)

  • SteraMist air and surface decontamination treatment (from £3.95 to £9.95 /m²)

  • Clearance validation sampling post remediation (£125 / sample - min 2 samples)

  • The reinstatement works by your preferred contractor

Not all elements outlined above may be required for your situation, however we will be able to talk to you about the most appropriate and cost-effective solution to get your issue resolved properly.

Let OUR family help YOUR family

All of this can sound quite intimidating but our aim is to take the fear out of the situation. With our commitment to long-term risk management and ongoing support we are trusted by Home Owners, Property Managers, Surveyors, Builders and Insurers to deliver a common sense decontamination action plan and a value for money solution.


Let our experienced team guide you through the steps we follow to ensure compliance with BSI PAS64:2013, HSE, COSHH, WHO and internationally recognised standards of duty of care to protect the health and well-being of people and to protect the environment with our non-toxic, green, environmentally friendly and sustainable solutions.



  • We are a certified IICRC Firm and follow ANSI/IICRC S500 and ANSI/IICRC S520 protocols in all our business activities

  • We are SAFECONTRACTOR approved

  • We are Checkatrade vetted and monitored

  • We are an approved supplier to the Crown Commercial Service

  • We are Cyber Essentials certified

  • We are a BICSc corporate member

  • We are certified to ISO 9001 Quality Management and ISO 14001 Environmental Management

  • We have over 35 years experience and have helped thousands of people just like you - please give us a call on 01536 682 300 or e-mail to have an informal discussion about your needs - we will simply provide sound, expert advice without pressure to undertake our services. We look forward to hearing from you.

Our friendly team is here to help you get back to normal - as QUICKLY and as PAIN-FREE as possible!

Our 5 STEP Mould Removal Program


  • A 30 minute appointment by phone with Phil for just £95.00 + vat

  • Phil has worked in the mould decontamination industry for over 35 years, is a master restorer, certified home inspector, Indoor Air Quality consultant, mould  remediation expert and has a wealth of experience to advise you on your particular situation

  • Phil will establish if you need our help or if it’s something you can fix yourself



  • The aim of the survey is to identify any building / construction defects internally or externally and to determine any source(s) of water ingress, current or historic that may be contributing to your poor health, illness or visible mould growth

  • A full moisture survey of walls, floors and ceilings

  • Measurement of air moisture levels and temperature to establish mould growth potential 

  • Thermography survey to assess possible damp areas from water ingress, condensation or missing insulation

  • Indoor air quality analysis - 6 Channel particulate sampling to indicate airborne particulate contamination levels

  • HYGIENA ATP surface swab samples (analysed on-site) to identify areas of highest risk for biological amplification

  • MYCOMETER®-SURFACE biomass sampling (additional laboratory fees apply)

  • AIR-O-CELL sampling (additional laboratory fees apply)

  • Allow 1-4 hours on-site 

  • A full environmental report follows detailing the issues identified, conclusions and recommendations

  • Where the results are inconclusive, a second “intrusive survey” may be required to establish biological growth that may be hidden in void spaces or behind installed furniture, etc.

  • If you wish to proceed with our recommended remediation solution we will be pleased to provide an estimate and our availability  



  • WHITE KNIGHT will compile comprehensive risk assessment and method statement documentation 

  • Your project manager will provide a detailed scope of works

  • Agree a start date and anticipated completion date (subject to any additional issues identified when invasive works commence)

  • Install engineering controls and erect critical barriers to prevent cross-contamination from the contaminated area. 

  • Install Negative Pressure Units to control airborne contamination outside the affected areas

  • Install HEPA 500 air scrubbers in the affected work areas to clean the ambient air during strip-out works

  • WHITE KNIGHT engineers follow a strict PPE donning/doffing protocol including the use of 3M PAPR respiratory protection systems

  • Remediate all microbial activity as per the agreed scope of works, to include:

    • Cleaning of hard surfaces with HEPA vacuum systems

    • Carefully removing affected porous structural materials 

  • Provide change orders to the scope of works if additional issues are identified that will take more time and/or incur additional costs

  • Perform ongoing indoor air quality analysis - 6 Channel particulate sampling



  • First phase HEPA Vacuum all surfaces inside the affected area

  • Wipe down and treat all surfaces with non-toxic anti-microbial solutions, rinse and allow to dry

  • Second phase HEPA Vacuum all surfaces inside the affected area and areas immediately outside the containment area

  • SteraMist application to knockdown all VOC’s and provide additional protection to surfaces and the surrounding air (SteraMist will also penetrate the fabric of the building to kill bacteria and inactivate pathogens in hidden / void spaces)



  • MYCOMETER®-AIR biomass sampling is performed to confirm that all airborne fungal contamination has been removed 

  • AIR-O-CELL cassette air sampling can be used to compare pre and post remediation spore concentrations 

  • HYGIENA MicroSnap™ TVC Swab sampling delivers same-day TVC test results, giving you the advantage of knowing microbial levels on the same day samples are collected. The test uses a novel bio-luminogenic test reaction that generates light when enzymes that are characteristic of viable bacteria react with substrates to produce light. The light generating signal is then quantified with the EnSURE™  Touch luminometer




Mycometer®-surface is a versatile analytical tool for testing surfaces and bulk materials for mould contamination. This US-EPA verified technology (2011) has been developed by research mycologists at the University of Copenhagen in collaboration with building inspectors and mould remediation specialists.


  • Mycometer®-surface measures spores, hyphae, fragments and can even measure non-viable cells

  • A mandatory user certification course ensures that all persons are trained in accordance with the specified test method procedures

  • Mycometer®-surface interpretation criteria differentiates mould growth, atypical surfaces and normal or clean surfaces




In assessed high risk areas aggressive Mycometer®-air sampling is used to identify the loading of spores, hyphae, fragments and particulates in the entire space by creating a vortex that pulls all settled particulates into the ambient air.


  • Mycometer®-air is the only US-EPA verified rapid method for quantifying airborne fungal biomass 

  • High reproducibility (<10% RSD) in the methodology 

  • The Mycometer®-air test is verified by US-EPA 

  • Objective analysis free from subjective evaluation 

  • Elimination of high short term variability with a standardised aggressive sampling protocol 

  • Aggressive Post Remediation sampling (similar to that used for asbestos) gives the best possible results for confident project clearance

  • Low chance of false negatives when using the aggressive sampling protocol



In assessed high risk areas AIR-O-CELL cassette air sampling can be performed to identify different mould species and offers guidance to the inspector on any biological amplification issues and the likely source.


  • Laboratory analysis provides a spore count of each genera identified 

  • Allows the inspector to look for certain marker spores that are indicative of a water damage issue


UltraSnap™ ATP swab sampling detects Adenosine Triphosphate (ATP) which is the energy molecule found in all living things, making it a perfect indicator when trying to determine if a surface is clean or not. ATP testing is widely performed in healthcare and food production facilities, to ensure that biofilms are not developing on the surface that could affect health or significantly affect the quality of an environment.


  • Following an ATP hygiene monitoring protocol provides information on the level of contamination in seconds

  • ATP is brought into contact with Hygiena's unique liquid-stable reagent in the test device, light is then emitted in direct proportion to the amount of ATP present in the sample


MicroSnap™ TVC swab sampling delivers total viable count test results after just 7 hours of incubation, giving rapid actionable data. The test uses a novel bio-luminogenic test reaction that generates light when enzymes that are characteristic of viable bacteria react with substrates to produce light. When MicroSnap TVC detects the specific microorganism the light generating signal emitted is then quantified and measured with the EnSURE TOUCH™ luminometer.


  • Traditional laboratory plating methods utilise colony counting techniques to determine CFU levels that take several days

  • MicroSnap technology derives equivalent CFU values using light detection in 7 hours not days

  • Detects Gram Positive and Negative bacteria including E. coli, Listeria, Shigella, Vibrio, Bacillus, Staphylococcus and Pseudomonas known to produce endotoxins and biotoxins